Cov khoom siv stainless hlau 17-4PH

17-4PH yog npaj kub forged. Thaum kho cua sov los yog forging, kev tiv thaiv huab cua uas muaj carbon lossis nitrogen yuav tsum raug zam. Cov ntsiab lus no tuaj yeem nqus tau rau hauv cov hlau nto thiab muab cov tawv nqaij austenitic. Yog tias qhov chaw tiv thaiv yuav tsum tau pom zoo argon lossis helium.

Lub alloy kuj muaj qhov zoo toughness thaum welded, thaum lub sij hawm luv luv-temperature kub kho txo ​​warping thiab scaling. Tsis tas li ntawd, 17-4PH yog ib qho yooj yim rau tshuab thiab fabricate.

Ua tsaug rau cov khoom muaj txiaj ntsig, 17-4PH pom siv hauv ntau yam lag luam. Yam khoom muaj xws li mechanical seals, oil patch, and pump shafts.

Machinability 17-4PH tuaj yeem ua rau hauv ob qho tib si cov tshuaj annealed mob thiab nag lossis daus hardened mob. Vim tias qhov kawg ntawm kev kho cua sov yog qhov tsawg, 17-4PH tuaj yeem ua rau qhov kawg ntawm qhov kev kho mob annealed thiab tom qab ntawd muaj hnub nyoog yam tsis muaj qhov hloov pauv loj lossis qhov loj me tshwj tsis yog tias cov khoom loj, thaum cov nyiaj yuav tsum tau ua rau kev cog lus ntawm kev laus.
Nyob rau hauv annealed mob machining tsuas yog marginally sib txawv ntawm 300 series austenitic stainless hlau. Nyob rau hauv H900 mob tus nqi machining yog 60% ntawm cov khoom siv annealed.

CHEMICAL COMPOSITION

QIB	SIB 316	17-4 PAB
Cov pa roj carbon	0.05	0.06
Manganese	2	0.9
Phosphorous	0.045	0.03
Sulfur	0.03	0.02
Silicon	N/A	0.9
Copper, Columbium, thiab Tantalum	N/A	4
Molybdenum	2.1	N/A
Nickel	8	4
Chromium	18	17.5

hysical Properties ntawm Stainless hlau 17-4PH

Khoom	Imperial	Metric
Melting Range	2560-2625 ° F	1404-1440 ° C
Tshwj xeeb kub	0.11 Btu/lb.-°F	460 Joules/gg-K
Tshwj xeeb ceev	0.282 lb/in3	7,8g 3
Hluav taws xob Resistivity	38.6 Ω	9 8cm;ua
Linear Coefficient ntawm Thermal Expansion (70 ° F txog 200 ° F) (21 ° C txog 93 ° C)	6 [in/in/°F·106]	10.8 [μm/m·°C]
Linear Coefficient ntawm Thermal Expansion (70 ° F txog 400 ° F) (21 ° C txog 204 ° C)	6 [in/in/°F·106]	10.8 [μm/m·°C]
Linear Coefficient ntawm Thermal Expansion (70 ° F txog 600 ° F) (27 ° C txog 316 ° C)	6.2 [hauv/hauv/°F·106]	11.2 [μm/m·°C]
Linear Coefficient ntawm Thermal Expansion (70 ° F txog 800 ° F) (21 ° C txog 427 ° C)	6.3 [hauv/hauv/°F·106]	11.2 [μm/m·°C]
Thermal conductivity (@ 300 ° F) (@ 149 ° C)	124 Btu/(hr/ft²/in/°F)	17.9 [W/m-K]
Thermal conductivity (@ 500 ° F) (@ 260 ° C)	135 Btu/(hr/ft²/in/°F)	19.5 [W/m-K]
Thermal conductivity (@ 860 ° F) (@ 460 ° C)	156 Btu/(hr/ft²/in/°F)	22.5 [W/m-K]
Thermal conductivity (@ 900 ° F) (@ 482 ° C)	157 Btu/(hr/ft²/in/°F)	22.6 [W/m-K]
Poisson tus piv (H900 Condition)	0.272	0.272
Modulus ntawm Elasticity (H900 Condition)	28 x 106 po	197 x 103 MPa
Modulus ntawm Rigidity hauv Torsion	9.68 x 103 hli	67 x 103 MPa

Stainless hlau 17-4PH Mechanical Properties

Khoom	Imperial	Metric
Qhov kawg Tensile Strength	23,300 psi	160 MPa
Lub zog muaj zog (0.02%)	16,680 psi	115 MPa
Elongation (% hauv 2')	5%	5%
Rockwell Hardness C	35	35

Kev kho cua sov

Stainless hlau 17-4PH yog muaj nyob rau hauv cov tshuaj annealed mob ntawm 1900 ° F (1038 ° C) thiab ces cua txias rau 90 ° F (32 ° C).

Txawm li cas los xij, kev kho cua sov ntxiv tuaj yeem tsim ntau yam hardness thiab toughness qib. Cov kev kho mob ntau tshaj yog teev nyob rau hauv cov lus hauv qab no.

Qhov xwm txheej	Qhov kub thiab txias [± 15 ° F (± 8.4 ° C)]	Txias txoj kev thiab Duration
H900 Nws	900 ° F (482 ° C)	Cua txias rau 1 teev
h925 ua	925 ° F (496 ° C)	Cua txias rau 4 teev
HWV 1025	1025 ° F (551 ° C)	Cua txias rau 4 teev
HWV 1075	1075 ° F (580 ° C)	Cua txias rau 4 teev
H1100 Nws	1100 ° F (593 ° C)	Cua txias rau 4 teev
HWV 1150	1150 ° F (621 ° C)	Cua txias rau 4 teev
H 1150 + 1150	1150 ° F (621 ° C) ua raws li 1150 ° F (621 ° C)	Cua txias rau 4 teev ua raws li Cua txias rau 4 teev
H 1150-M	1400 ° F (760 ° C) ua raws li 1150 ° F (621 ° C)	Cua txias rau 2 teev ua raws li Cua txias rau 4 teev